Why can't I use "killall"

[Peter Payne]

Question for smarter Mac-heads than me. I can quit apps using "killall" via 
scripting the terminal, for example if Transmit has frozen I can use "killall 
transmit" to kill and relaunch it. (I do this in scripts that run in the 
background, to make sure the scripts are running overnight.) However, no force 
in the universe will make Filemaker Pro die with "killall." Any idea what I 
would need to do? Any variation of "killall 'Filemaker Pro'" or "killall 
'Filemaker Pro.app'" returns "no matching processes belonging to you were 
found." Is there some magic trick to this?